21000980247

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1\times {\mathrm{70271}}^1$

素因数の和:70463

約数の個数: 32

約数和(自身を含む): 30852218880

約数和(自身を除く): 9851238633

約数列:

[1, 3, 13, 39, 79, 97, 237, 291, 1027, 1261, 3081, 3783, 7663, 22989, 70271, 99619, 210813, 298857, 913523, 2740569, 5551409, 6816287, 16654227, 20448861, 72168317, 88611731, 216504951, 265835193, 538486673, 1615460019, 7000326749, 21000980247]

約数ペア:

[(1, 21000980247), (3, 7000326749), (13, 1615460019), (39, 538486673), (79, 265835193), (97, 216504951), (237, 88611731), (291, 72168317), (1027, 20448861), (1261, 16654227), (3081, 6816287), (3783, 5551409), (7663, 2740569), (22989, 913523), (70271, 298857), (99619, 210813)]